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authorThierry Reding <treding@nvidia.com>2019-02-21 16:25:55 +0100
committerPhilipp Zabel <p.zabel@pengutronix.de>2019-03-20 11:18:53 +0100
commit22815f1825e4c50314e7084ca375f7368704fdd4 (patch)
tree8024963b4f3f1a794b6aea2c76b5cb74903f89cf /drivers/reset
parentf31d5c24fb2ea6fcfa4d300886eb87b662fbc0da (diff)
downloadlinux-22815f1825e4c50314e7084ca375f7368704fdd4.tar.bz2
reset: Add acquire/release support for arrays
Add implementations that apply acquire and release operations to all reset controls part of a reset control array. Signed-off-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/reset')
-rw-r--r--drivers/reset/core.c36
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index f94da91c22af..81ea77cba123 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -245,6 +245,34 @@ err:
return ret;
}
+static int reset_control_array_acquire(struct reset_control_array *resets)
+{
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < resets->num_rstcs; i++) {
+ err = reset_control_acquire(resets->rstc[i]);
+ if (err < 0)
+ goto release;
+ }
+
+ return 0;
+
+release:
+ while (i--)
+ reset_control_release(resets->rstc[i]);
+
+ return err;
+}
+
+static void reset_control_array_release(struct reset_control_array *resets)
+{
+ unsigned int i;
+
+ for (i = 0; i < resets->num_rstcs; i++)
+ reset_control_release(resets->rstc[i]);
+}
+
static inline bool reset_control_is_array(struct reset_control *rstc)
{
return rstc->array;
@@ -464,6 +492,9 @@ int reset_control_acquire(struct reset_control *rstc)
if (WARN_ON(IS_ERR(rstc)))
return -EINVAL;
+ if (reset_control_is_array(rstc))
+ return reset_control_array_acquire(rstc_to_array(rstc));
+
mutex_lock(&reset_list_mutex);
if (rstc->acquired) {
@@ -502,7 +533,10 @@ void reset_control_release(struct reset_control *rstc)
if (!rstc || WARN_ON(IS_ERR(rstc)))
return;
- rstc->acquired = false;
+ if (reset_control_is_array(rstc))
+ reset_control_array_release(rstc_to_array(rstc));
+ else
+ rstc->acquired = false;
}
EXPORT_SYMBOL_GPL(reset_control_release);